[Mass screening and control of cardiovascular diseases in school children].
D002648:Child; D004562:Electrocardiography; D005260:Female; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006331:Heart Diseases / Q000175:diagnosis* / Q000517:prevention & control; D006801:Humans; D008297:Male; D008403:Mass Screening; D013902:Radiography, Thoracic; D012572:School Health Services